In a letter dated Nov. 2 and obtained by CBC, government house leader Darin King asks NDP Leader Lorraine Michael to reveal the names of experts who have found evidence contrary to what the government has found to support the $7.4-billion hydro development.

"If you have evidence to contradict what Nalcor and others have said, it is incumbent on you, in the interest of public debate, to release that information," wrote King.

"To this point, all arguments against the project have been refuted by experts with their conclusions based on facts and empirical evidence."

The letter indicates the government has drawn a line in the sand over the opposition parties' call for expert witnesses to testify during the special debate in the legislature.

It has also raised questions about whether the Progressive Conservative government, and opposition Liberals and NDP will be able to agree on the terms of the debate.

If it does goes ahead, the government says it will begin no later than Nov. 19.

If the three political parties cannot reach an agreement, the Muskrat Falls project may have to be debated within the usual business of the house of assembly.